Stock Plans (Schedule of net cash proceeds from the exercise of stock options less shares used for withholding taxes and the intrisic value of options exercised) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Feb. 24, 2013	Feb. 26, 2012
Stock Plans [Abstract]
Net cash proceeds	$ 257.6	$ 208.5
Intrinsic value of options exercised	$ 247.4	$ 138.4